Relay and circuits therefor.



R. H. MANSON.

RELAY AND CIRCUITS THEREFOR. APPLICATION FILED 1 134.25, 1907.

1,030,415. v Patented June 25, 1912 Zn Q Pg Q jr *5; l 5 5 1, 2

Ma 7W R. H MANSON. RELAY AND CIRCUITS THEREFOR.

ABPLIOATION FILED APB..25, 1907.-

Patented June 25, 1912 4 SHEETS-SHEET 2 R. 11. MANSON. v 'BELAY AND CIRCUITS THEREFOR. APRLI OATION FILED APE.25, 1907.

1,030,;4115. Patented June 25, 1912.

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v flweniai"; I 0:9 HManawu branch exchanges with UNITED PATENT OFFICE.

RAY H. MANSON, OF ELYRIA, OHIO, .dSSIGNGR TO THE DEAN ELECTRIC COMPANY, OF ELYRIA, OHIO; A CORPORATION OF OHIO.

IRELAY AND CIRCUITS THEREFOR.

Specification of Letters Patent.

Application filed April 25, 1907. Serial No. 370,255.

I '0 all whom- 2'15 may concern Be it known that- I, RAY H. MANsoN, a citizen of the United States, residing at Elyria, in the county of Lorain and State of Ohio, have invented certain new and useful Improvements in Relays and Circuits Therefor, of whichthe following is a specification, reference being had therein to the accompanying drawing.

'My invention relates to improvements in self-restoring droprelays for lamp signal toll boards;"nnd it Consists in the constructions, combinations, and arrangements herein described and claimed.

.An object of my invention is to. provide a drop relay in which the armature is operated by gravity, supplemented by the action of a positive releasing device which operates to .force the armature away from the core if itshould be retained by residual magnetism.

A further object of my invention is to c011- structa drop relay in which the working parts are'on one side only of the mounting strip, thereby providing a device which can be located with other relays of modern de sign, and which can be readily adjusted and inspected when in use.

A further object of my invention is to provide a relay of great sensitiveness which can be used on the longest toll lines, and which can also be effectively used on the so-called ring down trunks for connecting private the main switch board.

Tn the accompanying drstwings,} forming part. of this application and in which similar reference symbols indicate: corresponding parts in the several views: Figure 1 is a side elevation of my improved relay *Fig. 2 is an end elevation showing the working parts; Fig. 3 is an elcvational view of the side opposite that shown in Fig. 1; Fig. 4 is a plan view of the device; Fig. 5 is a diagrammatic view showing the use of the relay in toll line circuits; Fig. 6 is a diagrammatic view shmving the use of the relay in toll cord circuits; Fig. 7 is a diagrammatic view showing, the use of the relay in a ring down trunk circuit for connecting a main exchange with a private branch exchange; Fig. 8 is a diagrammatic view showing 'a private. branch exchange hne circu t for use with the trunk circuit shown in Fig. 7.

Referring to the drawings, 1 and 2' indicate elcctromagnets disposed in parallel arrangement. Extending longitudinally of the electromagnets and immediately above them are the metal .frame plates 3 and 4, winch are bent at right angles at one end to form downwardly projecting arms, 5 and 6. These arms abut against the ends of the electromagnets and are securely clamped between them and a mounting plate 7 by a Patented June 25, 1912. I

common securing means, such as the thread-' ed bolts 8 and 9 and the nuts 10 and 11. The mounting plate 7 is perforated at suitable places to provide outlets for the terminals 12 of the magnet coils.

' Secured to the forward end of plate 3 by means of screws 13, is a perforated Z-shaped member 14, provided with an upturned flange 15 at its forward lower end. Arms.

16 are bent upward from the sides of the member 14 to provide bearings for the armature 17, which is pivo-ted'onsaid arms at 18" in such manner that its center of gravity lies forward of its pivot. The armature 17, theretorejtends to tilt forward and is kept from doing so only when held by the attraction of the core of the electromagnet 1;

whieh projects through the perforation in the Z-slraped member 14: in close proximityto said armature. 7 Y

A plate 19,- having an extension19' to which one end of a wire 19* is soldered, is secured to the upright flange 15 by means of screws 20, and is suitably insulated there from. Carried by said plate 19 is an adjustable contact screw 21, adapted to form an electrical contact with the armature 17 in its tilted position. An L-shaped'plate 22, having a laterally extending yoke 23 on one of the arms thereof, is secured to the upper end of the armature for a purpose hereinafter explained. Adjacent to the forward end of the electmmagnet 2 is an armature 24-- having a lateral extension 25 at its upper end,

on pivot pins 27 carried by plate 4. A re-' taining'screw 28 passing through the armasaid extension being provided withdownwardly extending slotted arms '26, adapted to pivotally supportsaid armatureture and underneath the plate 4 prevents displacement of the armature while permitting its ready removal without interfering with the free pivotal operation of the armature and its lateral extension 25. A retaining book 29 is pivoted on a pintle 30, held on the upri ht arms 31 of a slotted plate 32, which is a justably secured to theplate by screws 33. At one end of the plate there is provided an u iturned flange having an extensibn 34- adapted to limit the upward movement of the pivoted hook. At its forward end the retaining hook is provided with a lower am surface and an upper canrsurtace adapted to engage thelower and upper arms respectively of the yoke il hcn the magnet 2 is energized, t-hearmatureiQ attracted. and the lateral extension 25 at the top of the latter, and which forms with it a bell crank lever, lifts the retaining hook, allowing the armature 17 to drop against. the contact screw 21. It will be noted that, owing tothe construction of the ho it, there is camm' action on the upper a in of the yoke 23, t d the armature is M f ,ced away from the c il against any tendency. of residual magnetism to retain it.

20 ll hen a circuit is closed through the restor; ingcoil 1 the arn'iature I? is drawn toward from dropping back against the contact screw when the current 'hen. Moreover, the armature 17 on drawn to I guard the magnet acts through the medium of the hoolc 99 to force the armature Qlaway out the magnet 2.

igsfo and 6 showhthe application of my 'in'xiention to toll line and toll cord circuits.

lnFig. the toll line is designated by the numeral 65. l in mul- 5 through the liuecoil 2, as they are actuated the magnet 44-. The armature 4i. is actuated by l he n'iagnct '4-lto close the circuit at the point it-5'2. Batteries 46 are pro idcd in the lamp circuits. which may of 50 con: e be identical w h the main exchange battery. "the other end at the toll line may inchu-le magneto drops of the ordinary type or relays arranged to operate lamp signals. 6 is shown a button-strip 4? lii l i d with switch buttons 48 adapted -t 'witclws t), to throw into circuit t e generators for selective ringing. This-uni:ngemcnt for the purpose of ringing through the service trunks and calling the l cal subscribers. The calling plug 51 and the answering plug are connected in *"circuit with a. series of listening keys 55), and .i-"ijmlaptcd to be operated through the nuwl'i'uui ol' the buttons It, Band C on the huttihflatrip 4.7. The ge nerators 50 may he tile core and the retaining hOOlZ lQGEPS it connected either With the sleeve side or the tip side of the calling plug 51 by means of the switch 56. -The line coil 2 is permanently bridged across the line Wires and is wound to a high resistance to prevent short circuiting the voice currents. The signal lamp circuit includes the battery 57 and the lamp 58, and the circuit is closed when the armature 17 drops. The restoring coil 2 is also operated by the battery 57.

In operation, When a call comes in over line the drop magnet 2 is energized, the shutter 1? falls, and it the night switch 43 in the normal position shown, a circuit will be completed for the calling lamp 41 and the lousy lamps e2as follows: battery l6, lamp ll, to the switch 43, through wire 21 to the armature l7, and so to ground and hack to battery. from battery 46, lamps 42, switch 43, contact .1.5", hack to the switch to Wire 21 and back to battery. The operator will lien plug in with the answering plug P, and in doing so completes a circuit through. the sleeve contact of this plug and the thimbleot' the jack to the cutotl relay l4.- and the restoring magnet -1 of the drop relay which may be traced as follows: from the battery 57 (Fig. 6) to the sleeve of plug P, to the jack thimhle, to the magnet A, to the magnet 1 to ground and back to battery. Both magnets becoming energized, the armatures 15 are drawn in so as to disconnect the drop magnet 2 from the line and at the same time the shutter 17 pulls up and latches so the lamp 41 is extinguished. The pulling up of the armaturcs l5 also pulls'up the armature 45 completing the circuit of the busy lamps, Without depending upon the drop relay connection 17-21. The number of the Wanted 1 subscriber iay'ngbecn ascertained, the celling phi 1 is inserted in the desired jack, and the ringing keys are manipulated so as to connect one. or the other generator 50 to the main key 56, and by working this one way or the other, current is if .vn out upon either the sleeve or tip side of the line as the case may be. I am thus enabled to bridge fourpartics on each side of the line or eight in all.

lt will be noted that three keys on the strip in Fig. 6 are marked A, B, and' C. Key A is for listening on the answering hall of the cord and at the same time cutting oil the calling; half; lrey B is for lie toning bridged across the cord circuit; and key (l for listening on toe calling half and at the same time cutting oil the answering half of the cord circuit. It should be noted that it is necessary to interposc a service trunk between the calling cord and the local switchboard. assuming all of the circuits described herein to be on a toll board, and I th. provide a lamp shown in Fig. l a he called a supervisor and and a return ringing lamp, in a local circuit. The trunk line is not shown. I

When the reversing key 56 is in its normal position the frequency generators are connected to line over the tip side of the cord of the line to the ground side of generator through the lower half of the key 56. When the key 56 is operated the generator current goes to line from the sleeve side and the return path is to ground, either direct to the generator or by means of the tip side of line to the lower half of the key. This reversing key is usually provided by mounting extra springs on the listening key, the same being operated by the motion of the listening cam in a direction opposite to that used in listening. This scheme is of advantage because the reversed position of i the cam is always restored or changed to normal every time the cord circuit is put up, when the operator listens in. Thus there is no chance for mistakes-whereby the cam could be left in a reversed position when the operator rings.

The coil 2 is bridged across the cord circuit for clearing out purposes, and the coil 1 connected to a pair of contacts mounted on the listening key B so as who closed when it is operated. 'Thus when either sul o scriber rings off, the bridged magnet 2 in the cord circuit of Fig. 6 takes-current, throws down the drop, and closes the circuit of the lamp 58 through the battery 57. When the operator presses the listening key to bridge her telephone and ascertain if the parties have really finished their conversation, she closes the contacts of the circuit l and thereby restores the drop. By the withdrawing of the plugs P and P all the parts assume their normal position.

The above illustrations serve to show some of the uses to which my improved relay is adapted. It can also be used effectively on the so-called ring down trunks for connecting private branch exchanges with the main switch board. Here the subscribers line and is operated as such, the main switchboard operator ringing out on the trunk and operating either an old style drop or a lock-up relay. The former usually occupies too much space in the private branch board and the latter is unsatisfactory,

as the generator currcnthas a tendency to prevent the locking winding from being effective, and in order to operate at all must be very delicately adjusted to the exact conditions of the line. My new type of drop relay obviates both of these objections, as its action'is positive lamp signal.

A ring down trunk circuit for connecting a private branchexchange with a main exchange is shown in 7. In this figure, the trunk conductors 60 and 61 coming from path is through the sleeve side shutter 17 {is trunk is a regular and allows the use of a the main exchange terminate in the contacts 77 and 78 of a plug P attached to :1 connect ing cord at the private branch exchange. A key is provided in these conductors for ringing a called subscriber connected to the private branch exchange. The operating windin 2 of the calling drop is coimected by son ductors 60 and 61, a condenser 105 being inserted in the conductor 84. The conductor 62 extends through armature 63 of the mag: net energized by the restoring winding 1 of the drop relay. 'When the operating winding 2 of the drop is energized from the main exchange by sending ringing current through the conductors 60 and 61, an armature 24 is attracted, which, by means. of

latch 29, releases the drop shutter 17 by which a signal lamp 58 is lighted from the battery 57 through the following circuit:

' battery 57 lamp 58, drop shutter 17 wire 67, armature 68 to ground, and thus back to battery 57. The private branch exchange operator then operates key 69, which connects her operators set, not shown, to the conductors 60 and 61,.as a result of which she learns what connection is desired. The operation of the key 69 by means of the spring 71 closes a circuit from the main ex- 0 ange battery as -follows: through condoctor 60,- spring 71, wire 72, energizing winding of relay 73, wire 74, armature T5 of relay 87, Wire 76 to conductor 61, and" thence back to the main exchange, This causes the energization of the relay 73', which interrupts the circuit above traced through the lamp 58. The operation of the key 69 also closes a local circuit as follows: battery 57, re 81, restoring winding 1, wire 80, sprin 3 0 to ground, and thus back to battery 5 {as ayrc'sult of which the drop restored to' its normal position in engageggent with the latch 29 and-the armatures and 83 are attracted. The an mature 63 by engagement with its front contact, closes a locking circuit for the relay 7 3 as follows: conductor 60, wire 62, armature 63, wire 84,-armature 85, winding of the relay 73, armature 75, wire 76 to conductor 61, and thus back to the main exchange. When the armature 83 is moved to its front contact, a circuit is closed'through the lamp 82 as follows: battery "57, wire 81, lamp 82, armature 83', Wire'- 86, armature 88 to ground, and thus back to battery 57, as a result of which the ringing lamp 82 is lighted to indicate that the trunk circuit is in ringing condition.

The key 69 is held in its until the plug P has jack J shown in Fig. 8, corresponding to the called substation. This is for the purpose of maintaining the energization of the restoring winding 1 until its circuit is closed actuated position uctors 62 and 64 between the conbeen inserted in the through the plug P and jack J as follows:

battery 57, wire 81, windingl, Wire 80, contact 70 of plug P ring 103 of jack J to ground, and thus back to'battery 57. For this condition, the key 70 is operated, which results in sending ringing current in the welhknown manner through the line conductors 92 and 93 and the ringer 101 at the called substation. .llhen the called subscriber responds, a circuit is closed from the main exchange through the called substation as followsi trunk conductor 60, tip 77 of plug Pflspring 90 of jack J line wire 9'2, primary winding 0?, switch hook 100, transmitter 96, line wire 93. spring 91 of jack J, sleeve 78 of plug 3 energizing winding of relay 87 to conductor '61, and thus back to the main exchange, as aresult of which relay S7 is energized, which, by the attraction of armatures 75 and 88, opens the energizing circuit of relay 73 and the eir cuit through the ringing lamp 82, thus restoring this apparatus to its normal condition. i

The line circuit shown in Fig. 8 is of the 'type known as a. jack eut-ott' circuit, in which type the line relay 94 is normally connected to the jack springs 90 :and 91 by which the removal of the receiver 99 at the substation serves to call the exchange operator in the following manner: A, circuit is closed from battery 10% through the energizing winding of the line relay '94, spring 91, line wire 03, transmitter 96, switch hook 100, primary Winding 97, line wire 92 and jack spring 90, and thus back to battery 104,-.

' This results in closin a circuit. from batter 104 through the line signal lamp 95, as indicated.

'By using two separate coils, great sensitiveness can be attained in the drop portime so that the relay can be used on the longest toll lines. The restoring coil, being an entirely separate circuit, has ample power to draw up the heavy armature even when a large air-gap is used- Having thus described-my invention, what I claim and desire to secureby Letters Patent isz' l v 1. In a drop relay, a pair of electromagnets in parallel arrangement-,- a pair of pivr.

ote d armatures one for each-magnet, and means actuated by one armature for dropping the other armature.

2., In a drop relay, a pair of electromagnets in parallel arrangement, a pair of pivotally mounted armatures one for each magnet, a contact, and means actuated by one armature for dropping the other armature against the contact.

3. In a'relay, a pair of electromagnets in parallel arrangement, a frame upon which said magnets are mounted, a pair of armature's mounted on said frame and in perma- 'nentrelation to said inagnetsfan electric switch contact controlled oyone of said armatures, andmeans actuated by one armst-ure to-force the other armature to control.

a circuit through said contact-Q at. Ina relay, a pair of electromagne'ts in parallel arrangement, a pair of p votally mounted armatures at one end thereof, a-

contact, and means actuated by'one arma ture to force the other armature to control a circuit through said contact.

5. In a drop relay, a pair of electromagnets in parallel arrangement, a pair of pivotally mounted armatures one for each ma 7. In a droprelay, a pair of electromagnets disposed in parallel arrangement, common mounting means for said magnetsat one end thereofla separate pivoted-armature for each magnet arranged at the opposite end, and means actuated by 'one of said armatures for forcibly releasing the other armature. j

8. In a drop relay, "thecombinatlon of a mountingplate, a painof'frame plates, a

pair of electromagnets disposed infparallel arrangement and secure at one end to said frame plates, an armature haying a lateral extension pivotally mounted on one of said frame plates, a .Z-sha'ped member attached. to the other frame plate, a second armature mounted on said Z-shepe'd member and haying a laterally extending} yoke, a contact screw, a hook mounted on one (it-said traineplates and arranged to be actuated by sa d first mentioned armature to engage the arm of theyoke on said second armature to foreibly release said armature and to dropdt against said contact screw.

9. In amagneto relay, a pair of electto magnets in parallel arrangement, a pair of armatures therefor, a signal controlled by one armature, means for normally detain-' ing'said armature in inoperative condition,

and means controlled by the other armature to release the same and set the signal.

10. A signal device comprising in combination a pair of electromagnets in parallel arrangement, a signal controlled jointly thereby, and interlockingconnections between the said magnets whereby the signalmay be displayed ,and retired in due se: quence. I

11. In a signal device, a pair of electro magnets, a base upon which said magnets] are mounted, armatures for said magnets mounted on said base in permanent relation to said magnets, said armatures so related to each other that the operation of one armature forces the other armature to its retracted position.

12. In a signal device, a pair of electromagnet-s, and armatures for such magnets interconnected so that the operation of either armature forces the other armature to. its retracted position, each armature mounted upon a different pivot and adapted to be moved independently of the other during a partof its movement.

. 13. In a signal device, a pair of electromagnets, and armatures for such magnets interconnected so that mdvement of eithe ar mature moves the other armature from one of its positions to the other, each of said armatures mounted upon its associate magnet and adapted to move relative to the other armature.

14-. In a signal""dvice,'a pair otelectromagnets, an armature for each of such m agnets, and interconnecting mechanism between sucharmatures such that the operation of one armature forces the other armature to its retracted position, said mechzu nism including a canrand a catch lever.

15. In a signal device, a pair of electromagnets, an armature for each of such magnets, and interconnecting mechanism between such armatures such that the operation of either armature forces the other armature to its retracted position, said mechanism including a catch member associated ith each armature and permitting movement of one armature relative to the other.

16. In a signal device, a pair of electromagnets, an armature for each of such mag nets, and detachable interconnecting mechanism between such armatures such that movement of either armature moves the other armature from one of its positions to the other, such armatures being so related to each other that each may move independently of the other. I

17. In a signal device, a pair of electron'iagnets, an armature for each of such magnets, and detachable interconnecting mechanism between such 'armatures adapted to positively communicate motion from one ol such armaturcs to the other, such armatures bein so related to each other that each ma move independently of the other.

18. In a signal dcvice,a pair of electromagnets, an armature for each of such magnets, and detachable interconnecting mecha nism between such armatures adapted to positively communicate motion "from either of such armatures to the other, such armatures being so related to, each other that each may move indepcmlently ot the other;

19. Tn a signal device, a pair of electroiiim iiets in mrallel arraiwemcnt armatures K b 7 for such magnets so disposed opposite adjacent ends thereof that the operation of one armatm-e forces the other armature to its retracted position, and link mechanism associated with said armatures cminecting them together during a part of the movement of one and permitting relative movemei'it between said armalures during another part of the movement of said arn'iature.

20. Tn a signal device, a pair of electromagnets in parallel arrangement, armatures for such magnets so disposed opposite adjacent ends thereof that the operation of either armature forces the other armature to its retracted position and link mechanism associated with said armatures connecting them together during a part of the movement of one and pern'iitting relative movement between said armatures during another part of the movement of said armature.

21. In a signal device, a pair of electromagnets in parallel arrangement, armatures for such magnets so disposed opposite adjacent ends thereof that movement of either armature moves the other armature from one otits position to the otheigand link mechanism associated with said arn'iatures connecting them together during a part of the movement of one and permitting relative movement between said armatures during another part of the movement of said armature.

In testimony whereof I a'l'tix my signature in presence of two witnesses.

. RAY H. MANSON.

lVitnesses Gno. A. Scovinnn, S. J. Ronnnrs. 

